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Marc,
while I won't pour cold water on the "biggest you can" phase, I reckon the 10" f5 is as big as I would go. I have a home-brew 10" f5, and it is a great scope, perfect focal length, and at f5, digs deep.
It has suffered about 4 tubes so far, and the latest reincarnation is a truss C/F tube.
You capable of fabricating the tube? If so, simply purchase the optics and do the rest yourself. GSO optics are great, I have them in the 16" and had them in an 8" a while back. Can't go wrong, just make sure you don't skimp on the focuser.
Gary
Last edited by gbeal; 15-12-2008 at 05:19 PM.
Reason: Wow!! 15", doh.
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